11 providers offer 42 broadband deals in St Martin's, from £20.63 a month and up to 80 Mbps. Typical measured speed is 54 Mbps down and 13 Mbps up, 47% below the UK download average.
Best value broadband deal in St Martin's, Isles of Scilly (TR25)
The best value in St Martin's, Isles of Scilly (TR25) on full first-year cost is Plusnet's Fibre: £292 across year one, about £24 a month. A £90 reward card is bundled in. At 66 Mbps the speed is the trade-off, but at this price it covers everyday use.
Best value in St Martin's, Isles of Scilly (TR25)
£22.99/mo
rises to £26.99 in March 2027 (+£4)
Avg £26.32/mo over contract · £632 total over 24 months
Fastest broadband deal in St Martin's, Isles of Scilly (TR25)
The fastest deal available in St Martin's, Isles of Scilly (TR25) is Onestream Fibre 80 from Onestream at 80 Mbps. Below the UK average on download.
Fastest in St Martin's, Isles of Scilly (TR25)
Onestream Fibre 80
20 Mbps upload · Hybrid Fibre
Best for small homes, single 4K streamer
£21.45/mo
rises to £24.20 in April 2027 (+£2.75)
Avg £23.51/mo over contract · £564 total over 24 months
Cheapest broadband deal in St Martin's, Isles of Scilly (TR25)
The cheapest deal in St Martin's, Isles of Scilly (TR25) is Onestream Fibre 55 from Onestream at £19.94 a month for 40 Mbps. POP Telecom is essentially level at £21.75 a month. Well below the UK average, which shows on a busy evening.
Cheapest in St Martin's, Isles of Scilly (TR25)
Onestream Fibre 55
10 Mbps upload · Hybrid Fibre
Best for small homes, single 4K streamer
£19.94/mo
rises to £22.69 in April 2027 (+£2.75)
Avg £22/mo over contract · £528 total over 24 months
Runner-up on price
£21/mo
rises to £24 in April 2027 (+£3)
Avg £23.25/mo over contract · £558 total over 24 months
Compare broadband deals in St Martin's, Isles of Scilly (TR25)
£24.99/mo
rises to £28.99 in March 2027 (+£4)
Avg £28.32/mo over contract · £680 total over 24 months
Rebel Fibre (24m)
18 Mbps upload · Hybrid Fibre
Best for small homes, single 4K streamer
£34/mo
No rises, no surprises.
£816 total over 24 months
£21/mo
rises to £24 in April 2027 (+£3)
Avg £23.25/mo over contract · £558 total over 24 months
£22.99/mo
rises to £26.99 in March 2027 (+£4)
Avg £26.32/mo over contract · £632 total over 24 months
Broadband providers in St Martin's, Isles of Scilly (TR25)
11 providers serve St Martin's, Isles of Scilly (TR25), with Onestream the fastest at 80 Mbps.
Ranked by Ofcom complaints per 100,000 customers, fewest first. A down arrow is below the industry average, up is above, and a dash means Ofcom publishes no figure for that provider (usually because it is below Ofcom's 1.5% market-share reporting threshold). A small diagonal arrow shows the past-year trend (↘ improving, ↗ getting worse).
Ofcom records the typical St Martin's, Isles of Scilly (TR25) download speed at 54 Mbps.
Is your broadband good enough?
The typical St Martin's, Isles of Scilly (TR25) line runs 54 Mbps.
Working from home
OKStreaming and family use
OKWhat speeds are people actually getting?
Gigabit reaches 0% of St Martin's, Isles of Scilly (TR25), and the fastest available is 80 Mbps. The full split by band is below.
Which broadband networks reach St Martin's, Isles of Scilly (TR25)?
The wholesale networks carrying St Martin's, Isles of Scilly (TR25) broadband, from Openreach to Virgin Media and the altnets, read off the live deals.
We can only see Openreach behind the live deals in St Martin's, Isles of Scilly (TR25). The altnets haven't extended into the area in any form we track.
Real network footprint in St Martin's, Isles of Scilly (TR25): Openreach (Openreach is built out to roughly every house in the country).
Real provider count in St Martin's, Isles of Scilly (TR25): 11 actively selling into addresses.
What broadband coverage does St Martin's, Isles of Scilly (TR25) have?
Superfast broadband reaches 100% of St Martin's, Isles of Scilly (TR25) premises but gigabit only 0%, so around 100% of homes can get fast broadband but not the fastest.
How St Martin's, Isles of Scilly (TR25) compares within Isles of Scilly
Across 5 postcode districts in Isles of Scilly, by premises count, typical speed and gigabit coverage.
Nearby areas
Frequently asked questions
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* Based on Go.Compare research estimating that 28% of UK broadband users pay for faster broadband speeds than they need (which we interpret as overpaying), equivalent to around 7.5m UK households.
Speed and coverage figures for St Martin's, Isles of Scilly (TR25)come from Ofcom's Connected Nations data, current to January 2026. Deal prices are pulled live from providers. Compiled by the FindBroadband team. See how we rank and source our data.